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Name	Size	Permission	Date
davinci	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
drv-intf	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
i2c	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
tpg	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
cec-notifier.h	5.03 KB	-rw-r--r--	2024-03-10 20:38
cec-pin.h	2.79 KB	-rw-r--r--	2024-03-10 20:38
cec.h	17.08 KB	-rw-r--r--	2026-05-26 09:55
demux.h	22.69 KB	-rw-r--r--	2024-03-10 20:38
dmxdev.h	5.87 KB	-rw-r--r--	2024-03-10 20:38
dvb-usb-ids.h	19.46 KB	-rw-r--r--	2024-03-10 20:38
dvb_ca_en50221.h	4.35 KB	-rw-r--r--	2024-03-10 20:38
dvb_demux.h	10.77 KB	-rw-r--r--	2024-03-10 20:38
dvb_frontend.h	30.42 KB	-rw-r--r--	2024-03-10 20:38
dvb_net.h	2.43 KB	-rw-r--r--	2024-03-10 20:38
dvb_ringbuffer.h	8.32 KB	-rw-r--r--	2024-03-10 20:38
dvb_vb2.h	7.65 KB	-rw-r--r--	2024-03-10 20:38
dvbdev.h	14.77 KB	-rw-r--r--	2024-03-10 20:38
frame_vector.h	1.42 KB	-rw-r--r--	2024-03-10 20:38
imx.h	190 B	-rw-r--r--	2024-03-10 20:38
ipu-bridge.h	4.27 KB	-rw-r--r--	2024-03-10 20:38
jpeg.h	500 B	-rw-r--r--	2024-03-10 20:38
media-dev-allocator.h	2.21 KB	-rw-r--r--	2024-03-10 20:38
media-device.h	17.52 KB	-rw-r--r--	2024-03-10 20:38
media-devnode.h	5.29 KB	-rw-r--r--	2024-03-10 20:38
media-entity.h	47.31 KB	-rw-r--r--	2026-05-26 09:55
media-request.h	11.96 KB	-rw-r--r--	2024-03-10 20:38
mipi-csi2.h	1.46 KB	-rw-r--r--	2024-03-10 20:38
rc-core.h	12.15 KB	-rw-r--r--	2024-03-10 20:38
rc-map.h	14.47 KB	-rw-r--r--	2024-03-10 20:38
rcar-fcp.h	1.1 KB	-rw-r--r--	2024-03-10 20:38
tuner-types.h	7.54 KB	-rw-r--r--	2024-03-10 20:38
tuner.h	8.43 KB	-rw-r--r--	2024-03-10 20:38
tveeprom.h	3.3 KB	-rw-r--r--	2024-03-10 20:38
v4l2-async.h	11.67 KB	-rw-r--r--	2024-03-10 20:38
v4l2-cci.h	4.75 KB	-rw-r--r--	2024-03-10 20:38
v4l2-common.h	19.96 KB	-rw-r--r--	2026-05-26 09:55
v4l2-ctrls.h	54.48 KB	-rw-r--r--	2024-03-10 20:38
v4l2-dev.h	20.11 KB	-rw-r--r--	2024-03-10 20:38
v4l2-device.h	18.46 KB	-rw-r--r--	2024-03-10 20:38
v4l2-dv-timings.h	9.32 KB	-rw-r--r--	2026-05-26 09:55
v4l2-event.h	6.01 KB	-rw-r--r--	2024-03-10 20:38
v4l2-fh.h	4.22 KB	-rw-r--r--	2024-03-10 20:38
v4l2-flash-led-class.h	5.75 KB	-rw-r--r--	2024-03-10 20:38
v4l2-fwnode.h	15.57 KB	-rw-r--r--	2024-03-10 20:38
v4l2-h264.h	3.1 KB	-rw-r--r--	2024-03-10 20:38
v4l2-image-sizes.h	827 B	-rw-r--r--	2024-03-10 20:38
v4l2-ioctl.h	33.31 KB	-rw-r--r--	2024-03-10 20:38
v4l2-jpeg.h	5.08 KB	-rw-r--r--	2024-03-10 20:38
v4l2-mc.h	7.68 KB	-rw-r--r--	2024-03-10 20:38
v4l2-mediabus.h	8.76 KB	-rw-r--r--	2024-03-10 20:38
v4l2-mem2mem.h	29.27 KB	-rw-r--r--	2026-05-26 09:55
v4l2-rect.h	5.71 KB	-rw-r--r--	2024-03-10 20:38
v4l2-subdev.h	71.43 KB	-rw-r--r--	2026-05-26 09:55
v4l2-vp9.h	8.32 KB	-rw-r--r--	2024-03-10 20:38
videobuf2-core.h	50.44 KB	-rw-r--r--	2026-05-26 09:55
videobuf2-dma-contig.h	883 B	-rw-r--r--	2024-03-10 20:38
videobuf2-dma-sg.h	698 B	-rw-r--r--	2024-03-10 20:38
videobuf2-dvb.h	1.81 KB	-rw-r--r--	2024-03-10 20:38
videobuf2-memops.h	1.09 KB	-rw-r--r--	2024-03-10 20:38
videobuf2-v4l2.h	14.39 KB	-rw-r--r--	2024-03-10 20:38
videobuf2-vmalloc.h	509 B	-rw-r--r--	2024-03-10 20:38
vsp1.h	3.62 KB	-rw-r--r--	2024-03-10 20:38

Rename

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * v4l2-event.h
 *
 * V4L2 events.
 *
 * Copyright (C) 2009--2010 Nokia Corporation.
 *
 * Contact: Sakari Ailus <sakari.ailus@iki.fi>
 */

#ifndef V4L2_EVENT_H
#define V4L2_EVENT_H

#include <linux/types.h>
#include <linux/videodev2.h>
#include <linux/wait.h>

struct v4l2_fh;
struct v4l2_subdev;
struct v4l2_subscribed_event;
struct video_device;

/**
 * struct v4l2_kevent - Internal kernel event struct.
 * @list:	List node for the v4l2_fh->available list.
 * @sev:	Pointer to parent v4l2_subscribed_event.
 * @event:	The event itself.
 * @ts:		The timestamp of the event.
 */
struct v4l2_kevent {
	struct list_head	list;
	struct v4l2_subscribed_event *sev;
	struct v4l2_event	event;
	u64			ts;
};

/**
 * struct v4l2_subscribed_event_ops - Subscribed event operations.
 *
 * @add:	Optional callback, called when a new listener is added
 * @del:	Optional callback, called when a listener stops listening
 * @replace:	Optional callback that can replace event 'old' with event 'new'.
 * @merge:	Optional callback that can merge event 'old' into event 'new'.
 */
struct v4l2_subscribed_event_ops {
	int  (*add)(struct v4l2_subscribed_event *sev, unsigned int elems);
	void (*del)(struct v4l2_subscribed_event *sev);
	void (*replace)(struct v4l2_event *old, const struct v4l2_event *new);
	void (*merge)(const struct v4l2_event *old, struct v4l2_event *new);
};

/**
 * struct v4l2_subscribed_event - Internal struct representing a subscribed
 *		event.
 *
 * @list:	List node for the v4l2_fh->subscribed list.
 * @type:	Event type.
 * @id:	Associated object ID (e.g. control ID). 0 if there isn't any.
 * @flags:	Copy of v4l2_event_subscription->flags.
 * @fh:	Filehandle that subscribed to this event.
 * @node:	List node that hooks into the object's event list
 *		(if there is one).
 * @ops:	v4l2_subscribed_event_ops
 * @elems:	The number of elements in the events array.
 * @first:	The index of the events containing the oldest available event.
 * @in_use:	The number of queued events.
 * @events:	An array of @elems events.
 */
struct v4l2_subscribed_event {
	struct list_head	list;
	u32			type;
	u32			id;
	u32			flags;
	struct v4l2_fh		*fh;
	struct list_head	node;
	const struct v4l2_subscribed_event_ops *ops;
	unsigned int		elems;
	unsigned int		first;
	unsigned int		in_use;
	struct v4l2_kevent	events[] __counted_by(elems);
};

/**
 * v4l2_event_dequeue - Dequeue events from video device.
 *
 * @fh: pointer to struct v4l2_fh
 * @event: pointer to struct v4l2_event
 * @nonblocking: if not zero, waits for an event to arrive
 */
int v4l2_event_dequeue(struct v4l2_fh *fh, struct v4l2_event *event,
		       int nonblocking);

/**
 * v4l2_event_queue - Queue events to video device.
 *
 * @vdev: pointer to &struct video_device
 * @ev: pointer to &struct v4l2_event
 *
 * The event will be queued for all &struct v4l2_fh file handlers.
 *
 * .. note::
 *    The driver's only responsibility is to fill in the type and the data
 *    fields. The other fields will be filled in by V4L2.
 */
void v4l2_event_queue(struct video_device *vdev, const struct v4l2_event *ev);

/**
 * v4l2_event_queue_fh - Queue events to video device.
 *
 * @fh: pointer to &struct v4l2_fh
 * @ev: pointer to &struct v4l2_event
 *
 *
 * The event will be queued only for the specified &struct v4l2_fh file handler.
 *
 * .. note::
 *    The driver's only responsibility is to fill in the type and the data
 *    fields. The other fields will be filled in by V4L2.
 */
void v4l2_event_queue_fh(struct v4l2_fh *fh, const struct v4l2_event *ev);

/**
 * v4l2_event_wake_all - Wake all filehandles.
 *
 * Used when unregistering a video device.
 *
 * @vdev: pointer to &struct video_device
 */
void v4l2_event_wake_all(struct video_device *vdev);

/**
 * v4l2_event_pending - Check if an event is available
 *
 * @fh: pointer to &struct v4l2_fh
 *
 * Returns the number of pending events.
 */
int v4l2_event_pending(struct v4l2_fh *fh);

/**
 * v4l2_event_subscribe - Subscribes to an event
 *
 * @fh: pointer to &struct v4l2_fh
 * @sub: pointer to &struct v4l2_event_subscription
 * @elems: size of the events queue
 * @ops: pointer to &v4l2_subscribed_event_ops
 *
 * .. note::
 *
 *    if @elems is zero, the framework will fill in a default value,
 *    with is currently 1 element.
 */
int v4l2_event_subscribe(struct v4l2_fh *fh,
			 const struct v4l2_event_subscription *sub,
			 unsigned int elems,
			 const struct v4l2_subscribed_event_ops *ops);
/**
 * v4l2_event_unsubscribe - Unsubscribes to an event
 *
 * @fh: pointer to &struct v4l2_fh
 * @sub: pointer to &struct v4l2_event_subscription
 */
int v4l2_event_unsubscribe(struct v4l2_fh *fh,
			   const struct v4l2_event_subscription *sub);
/**
 * v4l2_event_unsubscribe_all - Unsubscribes to all events
 *
 * @fh: pointer to &struct v4l2_fh
 */
void v4l2_event_unsubscribe_all(struct v4l2_fh *fh);

/**
 * v4l2_event_subdev_unsubscribe - Subdev variant of v4l2_event_unsubscribe()
 *
 * @sd: pointer to &struct v4l2_subdev
 * @fh: pointer to &struct v4l2_fh
 * @sub: pointer to &struct v4l2_event_subscription
 *
 * .. note::
 *
 *	This function should be used for the &struct v4l2_subdev_core_ops
 *	%unsubscribe_event field.
 */
int v4l2_event_subdev_unsubscribe(struct v4l2_subdev *sd,
				  struct v4l2_fh *fh,
				  struct v4l2_event_subscription *sub);
/**
 * v4l2_src_change_event_subscribe - helper function that calls
 *	v4l2_event_subscribe() if the event is %V4L2_EVENT_SOURCE_CHANGE.
 *
 * @fh: pointer to struct v4l2_fh
 * @sub: pointer to &struct v4l2_event_subscription
 */
int v4l2_src_change_event_subscribe(struct v4l2_fh *fh,
				    const struct v4l2_event_subscription *sub);
/**
 * v4l2_src_change_event_subdev_subscribe - Variant of v4l2_event_subscribe(),
 *	meant to subscribe only events of the type %V4L2_EVENT_SOURCE_CHANGE.
 *
 * @sd: pointer to &struct v4l2_subdev
 * @fh: pointer to &struct v4l2_fh
 * @sub: pointer to &struct v4l2_event_subscription
 */
int v4l2_src_change_event_subdev_subscribe(struct v4l2_subdev *sd,
					   struct v4l2_fh *fh,
					   struct v4l2_event_subscription *sub);
#endif /* V4L2_EVENT_H */